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Background Occupational stress has become one of the main factors affecting people's physical and mental health, and there are many sources of occupational stress in petrochemical enterprises. Objective To evaluate the current situation of occupational stress and its related factors among employees in a petrochemical enterprise, and to provide a scientific basis for reduing the risk of occupational stress among employees in petrochemical enterprises. Methods In June 2022, a cross-sectional questionnaire survey was conducted in a petrochemical enterprise in Hainan, including a general information questionnaire for basic information, the Effort-Reward Imbalance (ERI) for occupational stress, and the Pittsburgh Sleep Quality Index (PSQI) for sleep quality. Chi-square test was used to compare differences in positive occupational stress by demographic characteristics, occupational characteristics, behavior, and occupational disease hazards. Logistic regression was employed to evaluate factors associated with occupational stress. Results Of the 1129 questionnaire distributed, a total of 999 valid questionnaire were returned,with a valid recovery rate of 88.5%. The positive rate of occupational stress among employees in the petrochemical enterprise was 29.5%. There were statistically significant differences in the positive rate of occupational stress among the employees grouped by gender, age, marital status, body mass index (BMI), monthly income, length of service, smoking, weekly working hours, type of work, working mode, sleep quality, noise exposure, and high temperature exposure (P<0.05). In terms of positive occupational stress among subcategories: workers being male (vs. female), working ＞40 h per week (vs. ≤40 h per week), regular day shift (vs. shift work), smoking (vs. not smoking), with exposure to noise and heat (vs. without such exposure), and having poor sleep quality (vs. good sleep quality) reported higher positive occupational stress rates (P＜0.05). The results of pairwise comparison showed that the positive rate of occupational stress in divorced (50.0%) or married (32.0%) workers was higher than that in single (27.1%) workers, and higher in operation workers (30.6%) than in other types of work (20.5%) (P＜0.05). The trend chi-square results showed that the positive rate of occupational stress increased linearly with the increase of age, length of service, BMI, or monthly income (P＜0.05). The results of logistic regression analysis after adjustment showed that workers who worked ＞40 h a week had a higher risk of occupational stress than those who worked ≤40 h a week, and the OR (95%CI) was 1.909 (1.135, 3.211); the workers of other types of work had a lower risk of reporting occupational stress than operation workers, and the OR (95%CI) was 0.513 (0.272, 0.968); the workers with noise exposure had a higher risk of occupational stress than the workers without, and the OR (95%CI) was 2.457 (1.070, 5.642). Conclusion The positive rate of occupational stress among employees in this petrochemical enterprise is high. Among them, operators, working hours per week＞40 h, and noise exposure may increase the incidence of occupational stress. The enterprise should actively take measures to reduce the occurrence of occupational stress among employees.
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{L-End}Objective To study the situation of occupational noise exposure and hearing loss in workers in petrochemical enterprises. {L-End}Methods A total of 2 052 workers from four large-scale petrochemical enterprises in China were selected as the research subjects using convenience sampling method. The noise-exposed level of job position was detected by individual noise dosimeters, and pure-tone audiometry of the workers was conducted. {L-End}Results The noise-exposed levels at various job positions in the workplace of the enterprises ranged from 83.2 to 86.7 dB(A), and 61.1% of the job positions had a cumulative noise exposure (CNE) > 95.0 dB(A) per year. The detection rate of high-frequency hearing loss was 12.6%(259/2 052) among the research subjects. The detection rate of speech frequency hearing loss was 5.5%(112/2 052) among the research subjects. The result of CNE stratified analysis showed that the detection rate of hearing loss at frequencies of 2.0, 3.0, 4.0, and 6.0 kHz, as well as high frequencies, gradually increased with increasing CNE (all P<0.05). {L-End}Conclusion The noise hazard in petrochemical enterprises is severe, and long-term occupational noise exposure can increase the risk of hearing loss among workers. Efforts should be made to strengthen noise control and hearing protection measures.
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OBJECTIVE: To analyze the diagnosis of occupational disease and the detection status of suspected occupational disease and occupational contraindication in recent years in a petrochemical enterprise. METHODS: The data of new cases of occupational disease reported by a petrochemical enterprise from 2008 to 2019, the cases of suspected occupational disease and occupational contraindication from 2015 to 2019 were collected. The related data was descriptively analyzed. RESULTS: A total of 30 new cases of occupational disease were reported in this petrochemical enterprise from 2008 to 2019. Among them, there were 16 cases of occupational noise deafness, 10 cases of chronic occupational benzene poisoning, 2 cases of occupational leukemia caused by benzene, 1 case of occupational solvent gasoline poisoning and 1 case of occupational pneumoconiosis. Among the 30 cases of occupational diseases, 28 cases(93.3%) were related to benzene and noise exposure, and 19 cases(63.3%) came from the chemical and oil refining divisions. From 2015 to 2019 in this petrochemical enterprise, 24 cases of suspected occupational disease were reported, of which 17(70.8%) suspected cases were diagnosed as occupational disease, and 63 cases of occupational contraindication were reported, including 47(74.6%) cases of occupational contraindication caused by noise. CONCLUSION: Benzene and noise should be taken as the key factors of occupational hazard for prevention and control in the petrochemical enterprises, and control measures should be adopted for special operation links and job posts to control the hidden dangers of benzene and noise that exceeds the standard limits.